A distributed grid-based watershed mercury loading model has been developed to characterize the spatial and temporal dynamics of mercury from both point and nonpoint sources. The model simulates flow, sediment transport, and mercury dynamics on a daily time step across a diverse landscape. The model is composed of six major components: (1) an ArcGIS interface for processing spatial input data; (2) a basic hydrologic module; (3) a sediment transport module; (4) a mercury transport and… CONTINUE READING